Air Quality Monitor

This page displays current air quality data for the West Phoenix monitor, which is operated by the Maricopa County Air Quality Department. All data are preliminary.

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Current Air Quality: West Phoenix

Current concentrations for each available pollutant, along with a graph displaying hourly data over the past 48-hours. The colors are using the AQI color scheme to highlight periods of good or poor air quality. Values are updated hourly at 30 minutes past the hour.

Ozone

39 ppb

Past 48-Hours


PM10

11 µg/m3

Past 48-Hours


PM2.5

3.9 µg/m3

Past 48-Hours


CO

0.6 ppm

Past 48-Hours


NO2

13 ppb

Past 48-Hours



Past Seven Days

Concentration values for the past seven days for each available pollutant. While the table displays concentrations, the color corresponds to the Air Quality Index (AQI).
Date
Ozone
PM10
PM2.5
CO
NO2
1/26/2023
41
20
6.6
1.0
37
1/27/2023
34
36
13.4
1.7
43
1/28/2023
32
46
22.7
1.9
38
1/29/2023
40
28
15.1
1.1
31
1/30/2023
37
20
7.5
0.9
35
1/31/2023
34
17
9.5
0.8
28
2/1/2023
36
23
10.1
1.4
35

Station History

The table displays the current day, month, and all-time high and low concentrations for each pollutant, along with the day on which the value occurred. If a tie occurs, the date displayed will be the most recent occurrence.
Ozone
PM10
PM2.5
CO
NO2
Daily High For February 2
45
2/2/2003
71
2/2/2006
20.8
2/2/2018
8.1
2/2/1987
75
2/2/2000
Daily Low For February 2
10
2/2/2002
6
2/2/2016
2.3
2/2/2016
0.2
2/2/2011
6
2/2/2011
Monthly High For February
65
2/17/1985
112
2/15/2006
32.3
2/6/2011
9.9
2/4/1984
148
2/5/1999
Monthly Low For February
0
2/1/1988
3
2/19/2017
0.9
2/17/2012
0.1
2/11/2020
6
2/2/2011
All-Time High
105
5/14/1993
259
7/8/2018
222.4
1/1/2021
15.3
1/1/1989
148
2/5/1999
All-Time Low
0
9/9/1992
3
3/13/2020
-1.1*
4/2/2012
0.0
8/1/2022
2
7/25/2010

Exceedances This Year

A list of the number of exceedances since the start of the year for each available pollutant. Expand the pollutant to view the date and concentration of each exceedance.
No exceedance days.
No exceedance days.
Date
Concentration (µg/m3)
1/1/2023
68
No exceedance days.
No exceedance days.
View past years >

Historical Data

Access historical data from the monitor. Historical Data >